Linkyo Replacement Brother TN-820 provides a sharp monochrome (black) text with a standard yield of 3,000 pages. Our replacement toner cartridges are priced at a fraction of the original Brother cartridge cost and designed to maximize your experience. DR-820 drum unit capacity of 30,000 pages and needs to be replaced after the use of 3 or 4 replacement toner cartridges. Buy replacement toner cartridges online from Linkyo to ensure a 100% Satisfaction Guarantee.